228085901 has 2 divisors, whose sum is σ = 228085902. Its totient is φ = 228085900.

The previous prime is 228085859. The next prime is 228085903. The reversal of 228085901 is 109580822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212868100 + 15217801 = 14590^2 + 3901^2 .

It is a cyclic number.

It is not a de Polignac number, because 228085901 - 2¹⁰ = 228084877 is a prime.

It is a Sophie Germain prime.

Together with 228085903, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228085903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114042950 + 114042951.

It is an arithmetic number, because the mean of its divisors is an integer number (114042951).

Almost surely, 2^228085901 is an apocalyptic number.

It is an amenable number.

228085901 is a deficient number, since it is larger than the sum of its proper divisors (1).

228085901 is an equidigital number, since it uses as much as digits as its factorization.

228085901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 228085901 is about 15102.5130690227. The cubic root of 228085901 is about 610.9881868814.

The spelling of 228085901 in words is "two hundred twenty-eight million, eighty-five thousand, nine hundred one".